Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem foi o vencedor na etapa 3?
 ###Tabelas: CREATE TABLE recent_divisional_champions (recent_divisional_champions_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Premier Division VARCHAR, Division One VARCHAR, Division Two VARCHAR, Division Three VARCHAR) CREATE TABLE ships_of_the_class (ships_of_the_class_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Pennant number VARCHAR, Laid down VARCHAR, Launched VARCHAR, Date of commission VARCHAR, Homeport (as of July 2013) VARCHAR, Planned decommission (as announced in 2009) VARCHAR) CREATE TABLE race_history (race_history_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Track VARCHAR, Race VARCHAR, Purse Hi VARCHAR, Finish VARCHAR, Time VARCHAR, Last 1/4 INT, Odds VARCHAR, Driver VARCHAR) CREATE TABLE discography (discography_id AUTO_INCREMENT PRIMARY KEY, Year INT, Album VARCHAR, Artist VARCHAR, Song VARCHAR, Note VARCHAR) CREATE TABLE classification_leadership (classification_leadership_id AUTO_INCREMENT PRIMARY KEY, Stage VARCHAR, Winner VARCHAR, General classification VARCHAR, Points classification VARCHAR, Mountains classification VARCHAR, Trofeo Fast Team VARCHAR)  
SELECT Winner FROM classification_leadership WHERE Stage = 3